. >> i was an obama mamma. and i was proud to claim that. >> reporter: not so much now. >> not so much. i'm not as enthused. >> do you think romney could be that change? >> it could be a change. i just don't know if it will be for the better. >> i would say knox, i'm not better off now than before. >> reporter: single dad omar lopez came to the u.s. from colombia 13 years ago. now a u.s. citizen, he owns a real estate business in las vegas, surviving one of the most depressed housing markets in the country. he supported president obama four years ago. >> we have to downsize. >> reporter: he too has grown disillusioned. >> reporter: what are governor romney's strong suits to you? >> his business side of view. and he knows how to make money. and our country needs to start making money. >> reporter: still mitt romney has yet to win this businessman over. lopez wants specifics, which tax loopholes will romney close, what will he do about immigration. >> you're holding out making a decision? >> i'm still holding out